Smoke-consuming furnace.



Patented Aug. 27,l90|..

ATTURNEYS.

A 1, w @62 F. a. mu 7 J ww fi/ WM 6 6 6 H E P A R S 0 N SMOKE CONSUMINGFURNACE. (Application filed Feb. 21, 1900. Renewed Jan. 29, 1901.)

THE upnms PETERS CO PHOTD'LH'HQH WASHINGTDN, D, C.

WITNESSES (No Model.)

UNITED STATES PATENT OFFICE.

HENRY E. PARSON, OF BROOKLYN, NEW YORK.

SMOKE-CONSUMING FURNACE.

SPECIFICATION forming part of Letters Patent N 0. 681 ,456, dated August27, 1901. Application filed February 21, 1900. Renewed January 29, 1901-Serial No. 4 4 N model) To all whom it may concern.-

Be it known that I, HENRY E. PARSON, a citizen of the United States,residing in New York, in the borough of Brooklyn and State of New York,have invented certain new and useful Improvements in Smoke-ConsumingFurnaces, of which the following is a specification.

This invention relates to certain improvements in smoke-consumingfurnaces of that class in which the fuel is burned on a perforated grateunder artificial draft supplied below the grate, so as to produce theperfect combustion of the fuel while the carbon particles contained inthe products of combustion are mingled with hot air and steam suppliedthrough fiues and outlet-openings in the fire-bridge, so that not onlythe more perfeet combustion of the fuel on the grate, but also the moreperfect combustion of the firegases, and consequently a considerablesaving in fuel, is obtained.

The invention consists of a smoke-consuming furnace in which a supply ofheated air and steam mingled together is furnished, by means of asuitable blower arranged in the rear wall of the furnace, through alongitudinal tube connecting the rear Wall with the fire-bridge into theash-pit and from the same to the fuel on the grate.

The invention consists, further, of suitable fiues arranged below thebanking-platform and fire-bridge, and openings extending through thefront, top, and rear of the firebridge, so that mingled air and steam issupplied in highly-heated condition, to the firegases passing over thefire-bridge.

The invention consists, further, of the combination of a hinged door foropening or closing the inlet-opening leading to the flue arranged belowthe banking-platform and firebridge, a connecting-rod leading from saiddoor through the front wall of the furnace, and means for locking saidrod in position so as to permit the adjustment of the door and thesupply of mingled steam and air to said fine, as will be fully describedhereinafter and finally pointed out in the claims.

In the accompanying drawings, Figure 1 is a vertical longitudinalsection of myimproved furnace on line 1 1, Fig. 2, part of the furnacebeing shown, however, in side elevation. Fig.

2 is a horizontal section on line 2 2, Fig. 1; and Fig. 3 is a detailvertical section of the mechanism for adjusting the door for opening orclosing the fines arranged in the banking-platform and fire-bridge.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents the grate of myimprovedsmoke-consuming furnace. The grate is constructed of grate-bars having anumber of conical holes tapering from the bottom toward the top of thebar. The grate-bars rest on transverse tubes a a, which are supported attheir ends in the side Walls of the furnace. The front wall of thefurnace is provided with fire and ash-pit doors in the usual manner,both doors being kept tightly closed, so that the fuel on the grate canbe burned in the combustion-chamber under forced draft.

At the rear of the grate A are arranged a banking-platform B and afire-bridge B, said platform serving for banking up the burning fuelwhen the ashes and cinders are to be removed from the top of the grate,the fuel being returned to and spread on the grate when the ashes andcinders are removed through the fire-doors. The banking-platform B andfire-bridge B are supported by a transverse masonry wall B The draft forburning the fuel is supplied to the grate through a longitudinal tube 0,which connects the rear wall of the furnace with the ash-pit, said tubepassing through the supporting-wall of the banking-platform andfire-bridge, preferably near one of the side walls of the furnace, asshown in Fig. 2. The rear end of the tube 0 communicates with the casingD of a steam-blower D, of any approved construction, to whichsuperheated steam is supplied by a steam-pipe D which is located in theside wall of the furnace and to which steam is supplied by a pipe D fromthe steam-dome of the boiler, a suitable regulating-valve and automaticregulator (not shown) being used in connection with the steam-supplypipe D The steam-blower D is provided with a number of nozzles, throughwhich steam is admitted into the casing D, said jets of steam sucking inthe air and heat ing the same in its passage through the easing D andtube 0. The tube 0 is heated by the fire-gases on their way from thefire-bridge through the space between the same and the rear wall of thefurnace, so that the mingled steam and air are reheated on their way tothe grate. The steam-and-air mixture is discharged at the front end ofthe tube 0 in a highly-heated state into the ash-pit and is thensupplied through the tapering openings in the grate to the small-sizedfuel on the same. In the tube 0 the temperature of the mingled steam andair drawn in by the steamblower is raised considerably over thetemperature imparted to the air by the superheated steam supplied to theblower, so that the air-and-steam mixture is conducted in a veryfavorable condition to the grate and to the glowing body of fuel on thesame, and thereby the almost complete combustion of the small-sized fuelon the grate obtained. Notwithstanding the heating up of the mingledsteam and air and the supplying of the same at a high temperature to thebody of glowing fuel on the grate the carbon particles contained in theproducts'of combustion are not entirely burned, which is necessary forrendering the smoke invisible. For burning the carbon particles stillcontained in the products of combustion of the fuel they are conductedover the banking-platform B and fire bridge B and mingled with anotherhighly-heated quantity of air and steam that is drawn from the ash-pitthrough an inletopening 6, arranged in the front of the basewall of thebanking-platform, and through a vertical fine 6 to horizontal branchflues 6 through a short rear flue e to a vertical flue e which extendstransversely in the firebridge and supplies the highly-heatedsteamand-air mixture through suitable jet-openings e in the front, top,and rear of the firebridge to the fire-gases that are drawn over thesame, so that by the proper intermingling of the heated air-and-steammixture with the fire-gases the almost complete combustion of theunburned carbon particles carried along by the same is produced, andthereby the production of visible smoke entirely prevented.

The inlet-opening e for the heating-fines located in the base-wall ofthe banking-platform B and in the fire-bridge B is closed by a door E,which is hinged at its upper end to a suitable frame in said opening andconnected by a hinge-joint with a longitudinal rod E, which is conductedthrough a stationary guide-sleeve E located in the front Wall of thefurnace to the outside of the same, said rod being provided with a knobor handle it at its outermost end. A pawlf is pivoted to the front endof the guide-sleeve E the rear end of which is secured to the front wallof the furnace by suitable screw-bolts, said pawl engaging notches f inthe outermost end of the rod E, as shown clearlyin Fig. 3. By pullingthe rod E in the forward direction the door E can be opened more orless, so as to regulate the quantity of air and steam sup= plied to thefines in the base-wall of the bank ing-platform and in the fire-bridge,the quantity supplied being regulated according to the condition of thefire on the grate, so as to produce thereby the more effectivecombustion of the same. When the working of the furnace is to beinterrupted, the door of the supply-flue is closed, and thereby thesupply of the heated steam and air to the fire-bridge interrupted.

The two improvements describe d-namely, the supply of a highly-heatedsteam-and-air mixture to the fuel on the grate and the supply of ahighly-heated air-and-steam mixture to the fire-gases passing over thefire-bridgeserve for the purpose of producing effective combustion ofthe fuel burned on the grate and of the carbon particles in thefire-gases, so that not onlya considerable saying in fuel is obtained,but by the almost complete combustion of the carbon particles in thefiregases the emission of visible smoke prevented.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination, in a boiler-furnace, with anash-pit and combustion-chamber, of a fire-bridge, a banking-platform infront of the same, heating-fines arranged in the banking-platform, aninlet-opening connecting said flues with the ash-pit, heating-finesarranged in the fire-bridge and connected with the lines of thebanking-platform, outletopenings in the fire-bridge, and means foropening or closing said inlet-opening, substantially as set forth.

2. The combination, in a boiler-furnace, with an ash-pit andcombustion-chamber, of a fire-bridge, a banking-platform in front of thesame, circulating-fines in said bridge and platform, an inlet-openingconnecting said flues with the ash-pit, and outlet-openings in the topof the fire-bridge, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

, HENRY E. PARSON.

Witnesses:

PAUL GoEPEL,

M. H. WURTZEL.

